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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NET_XFRM_H
2#define _NET_XFRM_H
3
Herbert Xuaabc9762005-05-03 16:27:10 -07004#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/xfrm.h>
6#include <linux/spinlock.h>
7#include <linux/list.h>
8#include <linux/skbuff.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -02009#include <linux/socket.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/pfkeyv2.h>
Masahide NAKAMURA57947082006-09-22 15:06:24 -070011#include <linux/ipsec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/in6.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080013#include <linux/mutex.h>
Joy Lattenab5f5e82007-09-17 11:51:22 -070014#include <linux/audit.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17#include <net/sock.h>
18#include <net/dst.h>
Herbert Xu436a0a42007-10-08 17:25:53 -070019#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <net/route.h>
21#include <net/ipv6.h>
22#include <net/ip6_fib.h>
Timo Teräsfe1a5f02010-04-07 00:30:04 +000023#include <net/flow.h>
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -080024
25#include <linux/interrupt.h>
26
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080027#ifdef CONFIG_XFRM_STATISTICS
28#include <net/snmp.h>
29#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070031#define XFRM_PROTO_ESP 50
32#define XFRM_PROTO_AH 51
33#define XFRM_PROTO_COMP 108
34#define XFRM_PROTO_IPIP 4
35#define XFRM_PROTO_IPV6 41
36#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
38
Nicolas Dichtelfa9921e2011-02-02 06:29:02 +000039#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
Herbert Xub59f45d2006-05-27 23:05:54 -070041#define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -070043#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080046#ifdef CONFIG_XFRM_STATISTICS
Alexey Dobriyan59c99402008-11-25 17:59:52 -080047#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
48#define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
49#define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080050#else
Alexey Dobriyan59c99402008-11-25 17:59:52 -080051#define XFRM_INC_STATS(net, field) ((void)(net))
52#define XFRM_INC_STATS_BH(net, field) ((void)(net))
53#define XFRM_INC_STATS_USER(net, field) ((void)(net))
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -080054#endif
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57/* Organization of SPD aka "XFRM rules"
58 ------------------------------------
59
60 Basic objects:
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
65
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
70
71 Lookup is plain linear search until the first match with selector.
72
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
79
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
83 |---. child .-> NULL
84
85 Bundles are cached at xrfm_policy struct (field ->bundles).
86
87
88 Resolution of xrfm_tmpl
89 -----------------------
90 Template contains:
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
101 flow id?
102
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
106
107 PROBLEMS:
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
116 */
117
Herbert Xu12a169e2008-10-01 07:03:24 -0700118struct xfrm_state_walk {
119 struct list_head all;
120 u8 state;
121 union {
122 u8 dying;
123 u8 proto;
124 };
125 u32 seq;
126};
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128/* Full description of state of transformer. */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000129struct xfrm_state {
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800130#ifdef CONFIG_NET_NS
131 struct net *xs_net;
132#endif
Herbert Xuabb81c42008-09-09 19:58:29 -0700133 union {
Herbert Xu12a169e2008-10-01 07:03:24 -0700134 struct hlist_node gclist;
Herbert Xuabb81c42008-09-09 19:58:29 -0700135 struct hlist_node bydst;
136 };
David S. Miller8f126e32006-08-24 02:45:07 -0700137 struct hlist_node bysrc;
138 struct hlist_node byspi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 atomic_t refcnt;
141 spinlock_t lock;
142
143 struct xfrm_id id;
144 struct xfrm_selector sel;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000145 struct xfrm_mark mark;
Martin Willi35d28562010-12-08 04:37:49 +0000146 u32 tfcpad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
David S. Miller9d4a7062006-08-24 03:18:09 -0700148 u32 genid;
149
Herbert Xu12a169e2008-10-01 07:03:24 -0700150 /* Key manager bits */
151 struct xfrm_state_walk km;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 /* Parameters of this state. */
154 struct {
155 u32 reqid;
156 u8 mode;
157 u8 replay_window;
158 u8 aalgo, ealgo, calgo;
159 u8 flags;
160 u16 family;
161 xfrm_address_t saddr;
162 int header_len;
163 int trailer_len;
Nicolas Dichtela947b0a2013-02-22 10:54:54 +0100164 u32 extra_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 } props;
166
167 struct xfrm_lifetime_cfg lft;
168
169 /* Data for transformer */
Martin Willi4447bb32009-11-25 00:29:52 +0000170 struct xfrm_algo_auth *aalg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 struct xfrm_algo *ealg;
172 struct xfrm_algo *calg;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800173 struct xfrm_algo_aead *aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 /* Data for encapsulator */
176 struct xfrm_encap_tmpl *encap;
177
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700178 /* Data for care-of address */
179 xfrm_address_t *coaddr;
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
182 struct xfrm_state *tunnel;
183
184 /* If a tunnel, number of users + 1 */
185 atomic_t tunnel_users;
186
187 /* State for replay detection */
188 struct xfrm_replay_state replay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000189 struct xfrm_replay_state_esn *replay_esn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800191 /* Replay detection state at the time we sent the last notification */
192 struct xfrm_replay_state preplay;
Steffen Klassert9736acf2011-03-08 00:05:43 +0000193 struct xfrm_replay_state_esn *preplay_esn;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800194
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000195 /* The functions for replay detection. */
196 struct xfrm_replay *repl;
197
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700198 /* internal flag that only holds state for delayed aevent at the
199 * moment
200 */
201 u32 xflags;
202
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800203 /* Replay detection notification settings */
204 u32 replay_maxage;
205 u32 replay_maxdiff;
206
207 /* Replay detection notification timer */
208 struct timer_list rtimer;
209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 /* Statistics */
211 struct xfrm_stats stats;
212
213 struct xfrm_lifetime_cur curlft;
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800214 struct tasklet_hrtimer mtimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Fan Due3c0d042012-07-30 21:43:54 +0000216 /* used to fix curlft->add_time when changing date */
217 long saved_tmo;
218
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700219 /* Last used time */
Herbert Xud26f3982007-11-13 21:47:08 -0800220 unsigned long lastused;
Masahide NAKAMURA9afaca02006-08-23 18:20:16 -0700221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 /* Reference to data common to all the instances of this
223 * transformer. */
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800224 const struct xfrm_type *type;
Herbert Xu13996372007-10-17 21:35:51 -0700225 struct xfrm_mode *inner_mode;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700226 struct xfrm_mode *inner_mode_iaf;
Herbert Xu13996372007-10-17 21:35:51 -0700227 struct xfrm_mode *outer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Trent Jaegerdf718372005-12-13 23:12:27 -0800229 /* Security context */
230 struct xfrm_sec_ctx *security;
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 /* Private data of this transformer, format is opaque,
233 * interpreted by xfrm_type methods. */
234 void *data;
235};
236
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800237static inline struct net *xs_net(struct xfrm_state *x)
238{
239 return read_pnet(&x->xs_net);
240}
241
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700242/* xflags - make enum if more show up */
243#define XFRM_TIME_DEFER 1
Fan Due3c0d042012-07-30 21:43:54 +0000244#define XFRM_SOFT_EXPIRE 2
Jamal Hadi Salim27170962006-04-14 15:03:05 -0700245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246enum {
247 XFRM_STATE_VOID,
248 XFRM_STATE_ACQ,
249 XFRM_STATE_VALID,
250 XFRM_STATE_ERROR,
251 XFRM_STATE_EXPIRED,
252 XFRM_STATE_DEAD
253};
254
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700255/* callback structure passed from either netlink or pfkey */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000256struct km_event {
Herbert Xubf088672005-06-18 22:44:00 -0700257 union {
258 u32 hard;
259 u32 proto;
260 u32 byid;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800261 u32 aevent;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -0700262 u32 type;
Herbert Xubf088672005-06-18 22:44:00 -0700263 } data;
264
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700265 u32 seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000266 u32 portid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700267 u32 event;
Alexey Dobriyan70678022008-11-25 17:50:36 -0800268 struct net *net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700269};
270
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000271struct xfrm_replay {
272 void (*advance)(struct xfrm_state *x, __be32 net_seq);
273 int (*check)(struct xfrm_state *x,
274 struct sk_buff *skb,
275 __be32 net_seq);
Steffen Klassert3b59df42012-09-04 00:03:29 +0000276 int (*recheck)(struct xfrm_state *x,
277 struct sk_buff *skb,
278 __be32 net_seq);
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000279 void (*notify)(struct xfrm_state *x, int event);
280 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
281};
282
Herbert Xu25ee3282007-12-11 09:32:34 -0800283struct net_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284struct xfrm_type;
285struct xfrm_dst;
286struct xfrm_policy_afinfo {
287 unsigned short family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 struct dst_ops *dst_ops;
Alexey Dobriyanddcfd792008-11-25 17:37:23 -0800289 void (*garbage_collect)(struct net *net);
Alexey Dobriyanc5b3cf42008-11-25 17:51:25 -0800290 struct dst_entry *(*dst_lookup)(struct net *net, int tos,
David S. Miller5e6b9302011-02-24 00:14:45 -0500291 const xfrm_address_t *saddr,
292 const xfrm_address_t *daddr);
Alexey Dobriyanfbda33b2008-11-25 17:56:49 -0800293 int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 void (*decode_session)(struct sk_buff *skb,
Herbert Xud5422ef2007-12-12 10:44:16 -0800295 struct flowi *fl,
296 int reverse);
David S. Miller05d84022011-02-22 17:47:10 -0800297 int (*get_tos)(const struct flowi *fl);
Patrick McHardy9d7b0fc2012-08-20 02:56:56 -0700298 void (*init_dst)(struct net *net,
299 struct xfrm_dst *dst);
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -0800300 int (*init_path)(struct xfrm_dst *path,
301 struct dst_entry *dst,
302 int nfheader_len);
Herbert Xu25ee3282007-12-11 09:32:34 -0800303 int (*fill_dst)(struct xfrm_dst *xdst,
Herbert Xu87c1e122010-03-02 02:51:56 +0000304 struct net_device *dev,
David S. Miller0c7b3ee2011-02-22 17:48:57 -0800305 const struct flowi *fl);
David S. Miller2774c132011-03-01 14:59:04 -0800306 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307};
308
Joe Perchesd5113372013-09-23 11:33:53 -0700309int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
310int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
311void km_policy_notify(struct xfrm_policy *xp, int dir,
312 const struct km_event *c);
313void km_state_notify(struct xfrm_state *x, const struct km_event *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315struct xfrm_tmpl;
Joe Perchesd5113372013-09-23 11:33:53 -0700316int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
317 struct xfrm_policy *pol);
318void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
319int __xfrm_state_delete(struct xfrm_state *x);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321struct xfrm_state_afinfo {
Herbert Xu17c2a422007-10-17 21:33:12 -0700322 unsigned int family;
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800323 unsigned int proto;
Al Viro8e3d7162008-03-17 22:49:16 -0700324 __be16 eth_proto;
Herbert Xu17c2a422007-10-17 21:33:12 -0700325 struct module *owner;
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800326 const struct xfrm_type *type_map[IPPROTO_MAX];
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700327 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
Herbert Xud094cd82005-06-20 13:19:41 -0700328 int (*init_flags)(struct xfrm_state *x);
David S. Miller73e5ebb2011-02-22 17:51:44 -0800329 void (*init_tempsel)(struct xfrm_selector *sel,
330 const struct flowi *fl);
David S. Miller19bd6242011-02-24 00:07:20 -0500331 void (*init_temprop)(struct xfrm_state *x,
332 const struct xfrm_tmpl *tmpl,
333 const xfrm_address_t *daddr,
334 const xfrm_address_t *saddr);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -0700335 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
336 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
Miika Komucdca7262007-02-06 14:24:56 -0800337 int (*output)(struct sk_buff *skb);
Steffen Klassert43a4dea2011-05-09 19:36:38 +0000338 int (*output_finish)(struct sk_buff *skb);
Herbert Xu227620e2007-11-13 21:41:28 -0800339 int (*extract_input)(struct xfrm_state *x,
340 struct sk_buff *skb);
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800341 int (*extract_output)(struct xfrm_state *x,
342 struct sk_buff *skb);
Herbert Xu716062f2007-11-13 21:44:23 -0800343 int (*transport_finish)(struct sk_buff *skb,
344 int async);
Hannes Frederic Sowa628e3412013-08-14 13:05:23 +0200345 void (*local_error)(struct sk_buff *skb, u32 mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346};
347
Joe Perchesd5113372013-09-23 11:33:53 -0700348int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
349int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
350struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
351void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Joe Perchesd5113372013-09-23 11:33:53 -0700353void xfrm_state_delete_tunnel(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000355struct xfrm_type {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 char *description;
357 struct module *owner;
jamala6337462010-02-09 13:21:17 +0000358 u8 proto;
359 u8 flags;
Masahide NAKAMURA1b5c2292006-08-23 18:11:50 -0700360#define XFRM_TYPE_NON_FRAGMENT 1
Herbert Xu436a0a42007-10-08 17:25:53 -0700361#define XFRM_TYPE_REPLAY_PROT 2
Herbert Xuf04e7e82007-11-13 21:36:51 -0800362#define XFRM_TYPE_LOCAL_COADDR 4
363#define XFRM_TYPE_REMOTE_COADDR 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Herbert Xu72cb6962005-06-20 13:18:08 -0700365 int (*init_state)(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 void (*destructor)(struct xfrm_state *);
Herbert Xue6956332006-04-01 00:52:46 -0800367 int (*input)(struct xfrm_state *, struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
David S. Miller8f029de2011-02-22 17:59:59 -0800369 int (*reject)(struct xfrm_state *, struct sk_buff *,
370 const struct flowi *);
Masahide NAKAMURAaee5adb2006-08-23 17:57:28 -0700371 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 /* Estimate maximal size of result of transformation of a dgram */
Patrick McHardyc5c25232007-04-09 11:47:18 -0700373 u32 (*get_mtu)(struct xfrm_state *, int size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374};
375
Joe Perchesd5113372013-09-23 11:33:53 -0700376int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
377int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Herbert Xub59f45d2006-05-27 23:05:54 -0700379struct xfrm_mode {
Herbert Xu227620e2007-11-13 21:41:28 -0800380 /*
381 * Remove encapsulation header.
382 *
383 * The IP header will be moved over the top of the encapsulation
384 * header.
385 *
386 * On entry, the transport header shall point to where the IP header
387 * should be and the network header shall be set to where the IP
388 * header currently is. skb->data shall point to the start of the
389 * payload.
390 */
391 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
392
393 /*
394 * This is the actual input entry point.
395 *
396 * For transport mode and equivalent this would be identical to
397 * input2 (which does not need to be set). While tunnel mode
398 * and equivalent would set this to the tunnel encapsulation function
399 * xfrm4_prepare_input that would in turn call input2.
400 */
Herbert Xub59f45d2006-05-27 23:05:54 -0700401 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xu37fedd32007-10-10 15:44:44 -0700402
403 /*
404 * Add encapsulation header.
405 *
406 * On exit, the transport header will be set to the start of the
407 * encapsulation header to be filled in by x->type->output and
408 * the mac header will be set to the nextheader (protocol for
409 * IPv4) field of the extension header directly preceding the
410 * encapsulation header, or in its absence, that of the top IP
411 * header. The value of the network header will always point
412 * to the top IP header while skb->data will point to the payload.
413 */
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800414 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
415
416 /*
417 * This is the actual output entry point.
418 *
419 * For transport mode and equivalent this would be identical to
420 * output2 (which does not need to be set). While tunnel mode
421 * and equivalent would set this to a tunnel encapsulation function
422 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
423 * call output2.
424 */
425 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
Herbert Xub59f45d2006-05-27 23:05:54 -0700426
Herbert Xu17c2a422007-10-17 21:33:12 -0700427 struct xfrm_state_afinfo *afinfo;
Herbert Xub59f45d2006-05-27 23:05:54 -0700428 struct module *owner;
429 unsigned int encap;
Herbert Xu1bfcb102007-10-17 21:31:50 -0700430 int flags;
431};
432
433/* Flags for xfrm_mode. */
434enum {
435 XFRM_MODE_FLAG_TUNNEL = 1,
Herbert Xub59f45d2006-05-27 23:05:54 -0700436};
437
Joe Perchesd5113372013-09-23 11:33:53 -0700438int xfrm_register_mode(struct xfrm_mode *mode, int family);
439int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
Herbert Xub59f45d2006-05-27 23:05:54 -0700440
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700441static inline int xfrm_af2proto(unsigned int family)
442{
443 switch(family) {
444 case AF_INET:
445 return IPPROTO_IPIP;
446 case AF_INET6:
447 return IPPROTO_IPV6;
448 default:
449 return 0;
450 }
451}
452
453static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
454{
455 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
456 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
457 return x->inner_mode;
458 else
459 return x->inner_mode_iaf;
460}
461
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000462struct xfrm_tmpl {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463/* id in template is interpreted as:
464 * daddr - destination of tunnel, may be zero for transport mode.
465 * spi - zero to acquire spi. Not zero if spi is static, then
466 * daddr must be fixed too.
467 * proto - AH/ESP/IPCOMP
468 */
469 struct xfrm_id id;
470
471/* Source address of tunnel. Ignored, if it is not a tunnel. */
472 xfrm_address_t saddr;
473
Miika Komu76b3f052006-11-30 16:40:43 -0800474 unsigned short encap_family;
475
jamala6337462010-02-09 13:21:17 +0000476 u32 reqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700478/* Mode: transport, tunnel etc. */
jamala6337462010-02-09 13:21:17 +0000479 u8 mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481/* Sharing mode: unique, this session only, this user only etc. */
jamala6337462010-02-09 13:21:17 +0000482 u8 share;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484/* May skip this transfomration if no SA is found */
jamala6337462010-02-09 13:21:17 +0000485 u8 optional;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Herbert Xuc5d18e92008-04-22 00:46:42 -0700487/* Skip aalgos/ealgos/calgos checks. */
jamala6337462010-02-09 13:21:17 +0000488 u8 allalgs;
Herbert Xuc5d18e92008-04-22 00:46:42 -0700489
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490/* Bit mask of algos allowed for acquisition */
jamala6337462010-02-09 13:21:17 +0000491 u32 aalgos;
492 u32 ealgos;
493 u32 calgos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494};
495
Masahide NAKAMURA622dc822006-08-23 17:52:01 -0700496#define XFRM_MAX_DEPTH 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Herbert Xu12a169e2008-10-01 07:03:24 -0700498struct xfrm_policy_walk_entry {
499 struct list_head all;
500 u8 dead;
501};
502
503struct xfrm_policy_walk {
504 struct xfrm_policy_walk_entry walk;
505 u8 type;
506 u32 seq;
507};
508
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100509struct xfrm_policy_queue {
510 struct sk_buff_head hold_queue;
511 struct timer_list hold_timer;
512 unsigned long timeout;
513};
514
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000515struct xfrm_policy {
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800516#ifdef CONFIG_NET_NS
517 struct net *xp_net;
518#endif
David S. Miller2518c7c2006-08-24 04:45:07 -0700519 struct hlist_node bydst;
520 struct hlist_node byidx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
522 /* This lock only affects elements except for entry. */
523 rwlock_t lock;
524 atomic_t refcnt;
525 struct timer_list timer;
526
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000527 struct flow_cache_object flo;
Timo Teräs80c802f2010-04-07 00:30:05 +0000528 atomic_t genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 u32 priority;
530 u32 index;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +0000531 struct xfrm_mark mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 struct xfrm_selector selector;
533 struct xfrm_lifetime_cfg lft;
534 struct xfrm_lifetime_cur curlft;
Herbert Xu12a169e2008-10-01 07:03:24 -0700535 struct xfrm_policy_walk_entry walk;
Steffen Klasserta0073fe2013-02-05 12:52:55 +0100536 struct xfrm_policy_queue polq;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200537 u8 type;
538 u8 action;
539 u8 flags;
Arnaldo Carvalho de Melo46ca5f52006-11-27 17:58:59 -0200540 u8 xfrm_nr;
Herbert Xu12a169e2008-10-01 07:03:24 -0700541 u16 family;
Trent Jaegerdf718372005-12-13 23:12:27 -0800542 struct xfrm_sec_ctx *security;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
544};
545
David S. Miller63eb23f2011-02-24 01:25:19 -0500546static inline struct net *xp_net(const struct xfrm_policy *xp)
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -0800547{
548 return read_pnet(&xp->xp_net);
549}
550
Arnaud Ebalard13c1d182008-10-05 13:33:42 -0700551struct xfrm_kmaddress {
552 xfrm_address_t local;
553 xfrm_address_t remote;
554 u32 reserved;
555 u16 family;
556};
557
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -0800558struct xfrm_migrate {
559 xfrm_address_t old_daddr;
560 xfrm_address_t old_saddr;
561 xfrm_address_t new_daddr;
562 xfrm_address_t new_saddr;
563 u8 proto;
564 u8 mode;
565 u16 reserved;
566 u32 reqid;
567 u16 old_family;
568 u16 new_family;
569};
570
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800571#define XFRM_KM_TIMEOUT 30
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800572/* what happened */
573#define XFRM_REPLAY_UPDATE XFRM_AE_CR
574#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
575
576/* default aevent timeout in units of 100ms */
577#define XFRM_AE_ETIME 10
578/* Async Event timer multiplier */
579#define XFRM_AE_ETH_M 10
580/* default seq threshold size */
581#define XFRM_AE_SEQT_SIZE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000583struct xfrm_mgr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 struct list_head list;
585 char *id;
David S. Miller214e0052011-02-24 00:02:38 -0500586 int (*notify)(struct xfrm_state *x, const struct km_event *c);
Fan Du65e07362012-08-15 10:13:47 +0800587 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
Venkat Yekkiralacb969f02006-07-24 23:32:20 -0700588 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
Al Viro5d36b182006-11-08 00:24:06 -0800589 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
David S. Miller214e0052011-02-24 00:02:38 -0500590 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
Alexey Dobriyandb983c12008-11-25 17:51:01 -0800591 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
David S. Miller183cad12011-02-24 00:28:01 -0500592 int (*migrate)(const struct xfrm_selector *sel,
593 u8 dir, u8 type,
594 const struct xfrm_migrate *m,
595 int num_bundles,
596 const struct xfrm_kmaddress *k);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597};
598
Joe Perchesd5113372013-09-23 11:33:53 -0700599int xfrm_register_km(struct xfrm_mgr *km);
600int xfrm_unregister_km(struct xfrm_mgr *km);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Herbert Xu436a0a42007-10-08 17:25:53 -0700602/*
603 * This structure is used for the duration where packets are being
604 * transformed by IPsec. As soon as the packet leaves IPsec the
605 * area beyond the generic IP part may be overwritten.
606 */
607struct xfrm_skb_cb {
608 union {
609 struct inet_skb_parm h4;
610 struct inet6_skb_parm h6;
611 } header;
612
613 /* Sequence number for replay protection. */
Herbert Xub318e0e2008-02-12 22:50:35 -0800614 union {
Steffen Klassert1ce36442011-03-08 00:06:31 +0000615 struct {
616 __u32 low;
617 __u32 hi;
618 } output;
619 struct {
620 __be32 low;
621 __be32 hi;
622 } input;
Herbert Xub318e0e2008-02-12 22:50:35 -0800623 } seq;
Herbert Xu436a0a42007-10-08 17:25:53 -0700624};
625
626#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
627
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800628/*
629 * This structure is used by the afinfo prepare_input/prepare_output functions
630 * to transmit header information to the mode input/output functions.
631 */
632struct xfrm_mode_skb_cb {
633 union {
634 struct inet_skb_parm h4;
635 struct inet6_skb_parm h6;
636 } header;
637
638 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
639 __be16 id;
640 __be16 frag_off;
641
Herbert Xu732c8bd2008-03-26 16:51:09 -0700642 /* IP header length (excluding options or extension headers). */
643 u8 ihl;
644
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800645 /* TOS for IPv4, class for IPv6. */
646 u8 tos;
647
648 /* TTL for IPv4, hop limitfor IPv6. */
649 u8 ttl;
650
651 /* Protocol for IPv4, NH for IPv6. */
652 u8 protocol;
653
Herbert Xu732c8bd2008-03-26 16:51:09 -0700654 /* Option length for IPv4, zero for IPv6. */
655 u8 optlen;
656
Herbert Xu36cf9ac2007-11-13 21:40:52 -0800657 /* Used by IPv6 only, zero for IPv4. */
658 u8 flow_lbl[3];
659};
660
661#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
662
Herbert Xu716062f2007-11-13 21:44:23 -0800663/*
664 * This structure is used by the input processing to locate the SPI and
665 * related information.
666 */
667struct xfrm_spi_skb_cb {
668 union {
669 struct inet_skb_parm h4;
670 struct inet6_skb_parm h6;
671 } header;
672
Herbert Xu716062f2007-11-13 21:44:23 -0800673 unsigned int daddroff;
Herbert Xu2fcb45b2007-12-03 22:54:12 -0800674 unsigned int family;
Herbert Xu716062f2007-11-13 21:44:23 -0800675};
676
677#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
678
Joy Latten161a09e2006-11-27 13:11:54 -0600679/* Audit Information */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000680struct xfrm_audit {
Joy Latten161a09e2006-11-27 13:11:54 -0600681 u32 secid;
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700682 kuid_t loginuid;
Eric Paris25323862008-04-18 10:09:25 -0400683 u32 sessionid;
Joy Latten161a09e2006-11-27 13:11:54 -0600684};
Joy Lattenc9204d92006-11-30 15:50:43 -0600685
686#ifdef CONFIG_AUDITSYSCALL
Paul Mooreafeb14b2007-12-21 14:58:11 -0800687static inline struct audit_buffer *xfrm_audit_start(const char *op)
Joy Lattenab5f5e82007-09-17 11:51:22 -0700688{
689 struct audit_buffer *audit_buf = NULL;
Paul Mooreafeb14b2007-12-21 14:58:11 -0800690
691 if (audit_enabled == 0)
692 return NULL;
693 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
694 AUDIT_MAC_IPSEC_EVENT);
695 if (audit_buf == NULL)
696 return NULL;
697 audit_log_format(audit_buf, "op=%s", op);
698 return audit_buf;
699}
700
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700701static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
Paul Mooreafeb14b2007-12-21 14:58:11 -0800702 struct audit_buffer *audit_buf)
703{
Joy Lattenab5f5e82007-09-17 11:51:22 -0700704 char *secctx;
705 u32 secctx_len;
706
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700707 audit_log_format(audit_buf, " auid=%u ses=%u",
708 from_kuid(&init_user_ns, auid), ses);
Paul Moore68277ac2007-12-20 20:49:33 -0800709 if (secid != 0 &&
710 security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) {
Joy Lattenab5f5e82007-09-17 11:51:22 -0700711 audit_log_format(audit_buf, " subj=%s", secctx);
712 security_release_secctx(secctx, secctx_len);
713 } else
714 audit_log_task_context(audit_buf);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700715}
716
Joe Perchesd5113372013-09-23 11:33:53 -0700717void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid,
718 u32 ses, u32 secid);
719void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid,
720 u32 ses, u32 secid);
721void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid,
722 u32 ses, u32 secid);
723void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid,
724 u32 ses, u32 secid);
725void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
726 struct sk_buff *skb);
727void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
728 __be32 net_seq);
729void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
730void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
731 __be32 net_seq);
732void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
733 u8 proto);
Joy Lattenc9204d92006-11-30 15:50:43 -0600734#else
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700735
736static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700737 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700738{
739}
740
741static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700742 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700743{
744}
745
746static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700747 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700748{
749}
750
751static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700752 kuid_t auid, u32 ses, u32 secid)
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700753{
754}
755
756static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
757 struct sk_buff *skb)
758{
759}
760
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000761static inline void xfrm_audit_state_replay(struct xfrm_state *x,
762 struct sk_buff *skb, __be32 net_seq)
763{
764}
765
Marcin Slusarz41fef0e2008-05-03 21:03:01 -0700766static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
767 u16 family)
768{
769}
770
771static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
772 __be32 net_spi, __be32 net_seq)
773{
774}
775
776static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
777 struct sk_buff *skb, u8 proto)
778{
779}
Joy Lattenc9204d92006-11-30 15:50:43 -0600780#endif /* CONFIG_AUDITSYSCALL */
Joy Latten161a09e2006-11-27 13:11:54 -0600781
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782static inline void xfrm_pol_hold(struct xfrm_policy *policy)
783{
784 if (likely(policy != NULL))
785 atomic_inc(&policy->refcnt);
786}
787
Joe Perchesd5113372013-09-23 11:33:53 -0700788void xfrm_policy_destroy(struct xfrm_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
790static inline void xfrm_pol_put(struct xfrm_policy *policy)
791{
792 if (atomic_dec_and_test(&policy->refcnt))
WANG Cong64c31b32008-01-07 22:34:29 -0800793 xfrm_policy_destroy(policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794}
795
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700796static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
797{
798 int i;
799 for (i = npols - 1; i >= 0; --i)
800 xfrm_pol_put(pols[i]);
801}
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -0700802
Joe Perchesd5113372013-09-23 11:33:53 -0700803void __xfrm_state_destroy(struct xfrm_state *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
Herbert Xu21380b82006-02-22 14:47:13 -0800805static inline void __xfrm_state_put(struct xfrm_state *x)
806{
807 atomic_dec(&x->refcnt);
808}
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810static inline void xfrm_state_put(struct xfrm_state *x)
811{
812 if (atomic_dec_and_test(&x->refcnt))
813 __xfrm_state_destroy(x);
814}
815
816static inline void xfrm_state_hold(struct xfrm_state *x)
817{
818 atomic_inc(&x->refcnt);
819}
820
David S. Miller1744a8f2011-02-22 18:02:12 -0800821static inline bool addr_match(const void *token1, const void *token2,
822 int prefixlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
David S. Miller1744a8f2011-02-22 18:02:12 -0800824 const __be32 *a1 = token1;
825 const __be32 *a2 = token2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 int pdw;
827 int pbi;
828
jamala6337462010-02-09 13:21:17 +0000829 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
831
832 if (pdw)
833 if (memcmp(a1, a2, pdw << 2))
David S. Miller1744a8f2011-02-22 18:02:12 -0800834 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
836 if (pbi) {
Al Viro5f193432006-09-27 18:46:32 -0700837 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839 mask = htonl((0xffffffff) << (32 - pbi));
840
841 if ((a1[pdw] ^ a2[pdw]) & mask)
David S. Miller1744a8f2011-02-22 18:02:12 -0800842 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 }
844
David S. Miller1744a8f2011-02-22 18:02:12 -0800845 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846}
847
Alexey Dobriyan26bff942011-11-22 06:46:02 +0000848static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
849{
850 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
851 if (prefixlen == 0)
852 return true;
853 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
854}
855
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500857__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858{
Al Virof9d07e41f82006-09-27 18:45:50 -0700859 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500860 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 case IPPROTO_TCP:
862 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800863 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500865 port = uli->ports.sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 break;
867 case IPPROTO_ICMP:
868 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500869 port = htons(uli->icmpt.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 break;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700871 case IPPROTO_MH:
David S. Miller6281dcc2011-03-12 00:43:55 -0500872 port = htons(uli->mht.type);
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700873 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000874 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500875 port = htons(ntohl(uli->gre_key) >> 16);
Timo Teräscc9ff192010-11-03 04:41:38 +0000876 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 default:
878 port = 0; /*XXX*/
879 }
880 return port;
881}
882
883static __inline__
David S. Miller6281dcc2011-03-12 00:43:55 -0500884__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885{
Al Virof9d07e41f82006-09-27 18:45:50 -0700886 __be16 port;
David S. Miller1d28f422011-03-12 00:29:39 -0500887 switch(fl->flowi_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 case IPPROTO_TCP:
889 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800890 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 case IPPROTO_SCTP:
David S. Miller6281dcc2011-03-12 00:43:55 -0500892 port = uli->ports.dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 break;
894 case IPPROTO_ICMP:
895 case IPPROTO_ICMPV6:
David S. Miller6281dcc2011-03-12 00:43:55 -0500896 port = htons(uli->icmpt.code);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 break;
Timo Teräscc9ff192010-11-03 04:41:38 +0000898 case IPPROTO_GRE:
David S. Miller6281dcc2011-03-12 00:43:55 -0500899 port = htons(ntohl(uli->gre_key) & 0xffff);
Timo Teräscc9ff192010-11-03 04:41:38 +0000900 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 default:
902 port = 0; /*XXX*/
903 }
904 return port;
905}
906
Joe Perchesd5113372013-09-23 11:33:53 -0700907bool xfrm_selector_match(const struct xfrm_selector *sel,
908 const struct flowi *fl, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Trent Jaegerdf718372005-12-13 23:12:27 -0800910#ifdef CONFIG_SECURITY_NETWORK_XFRM
911/* If neither has a context --> match
912 * Otherwise, both must have a context and the sids, doi, alg must match
913 */
David S. Millerbc9b35a2012-05-15 15:04:57 -0400914static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800915{
916 return ((!s1 && !s2) ||
917 (s1 && s2 &&
918 (s1->ctx_sid == s2->ctx_sid) &&
919 (s1->ctx_doi == s2->ctx_doi) &&
920 (s1->ctx_alg == s2->ctx_alg)));
921}
922#else
David S. Millerbc9b35a2012-05-15 15:04:57 -0400923static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
Trent Jaegerdf718372005-12-13 23:12:27 -0800924{
David S. Millerbc9b35a2012-05-15 15:04:57 -0400925 return true;
Trent Jaegerdf718372005-12-13 23:12:27 -0800926}
927#endif
928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929/* A struct encoding bundle of transformations to apply to some set of flow.
930 *
931 * dst->child points to the next element of bundle.
932 * dst->xfrm points to an instanse of transformer.
933 *
934 * Due to unfortunate limitations of current routing cache, which we
935 * have no time to fix, it mirrors struct rtable and bound to the same
936 * routing key, including saddr,daddr. However, we can have many of
937 * bundles differing by session id. All the bundles grow from a parent
938 * policy rule.
939 */
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000940struct xfrm_dst {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 struct dst_entry dst;
943 struct rtable rt;
944 struct rt6_info rt6;
945 } u;
946 struct dst_entry *route;
Timo Teräs80c802f2010-04-07 00:30:05 +0000947 struct flow_cache_object flo;
948 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
949 int num_pols, num_xfrms;
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700950#ifdef CONFIG_XFRM_SUB_POLICY
951 struct flowi *origin;
952 struct xfrm_selector *partner;
953#endif
Timo Teräs80c802f2010-04-07 00:30:05 +0000954 u32 xfrm_genid;
955 u32 policy_genid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 u32 route_mtu_cached;
957 u32 child_mtu_cached;
Hideaki YOSHIFUJI92d63de2005-05-26 12:58:04 -0700958 u32 route_cookie;
959 u32 path_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960};
961
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700962#ifdef CONFIG_XFRM
Herbert Xuaabc9762005-05-03 16:27:10 -0700963static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
964{
Timo Teräs80c802f2010-04-07 00:30:05 +0000965 xfrm_pols_put(xdst->pols, xdst->num_pols);
Herbert Xuaabc9762005-05-03 16:27:10 -0700966 dst_release(xdst->route);
967 if (likely(xdst->u.dst.xfrm))
968 xfrm_state_put(xdst->u.dst.xfrm);
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700969#ifdef CONFIG_XFRM_SUB_POLICY
970 kfree(xdst->origin);
971 xdst->origin = NULL;
972 kfree(xdst->partner);
973 xdst->partner = NULL;
974#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700975}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -0700976#endif
Herbert Xuaabc9762005-05-03 16:27:10 -0700977
Joe Perchesd5113372013-09-23 11:33:53 -0700978void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
Herbert Xuaabc9762005-05-03 16:27:10 -0700979
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000980struct sec_path {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 atomic_t refcnt;
982 int len;
Herbert Xudbe5b4a2006-04-01 00:54:16 -0800983 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984};
985
Michael Smith990078a2011-04-07 04:51:51 +0000986static inline int secpath_exists(struct sk_buff *skb)
987{
988#ifdef CONFIG_XFRM
989 return skb->sp != NULL;
990#else
991 return 0;
992#endif
993}
994
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995static inline struct sec_path *
996secpath_get(struct sec_path *sp)
997{
998 if (sp)
999 atomic_inc(&sp->refcnt);
1000 return sp;
1001}
1002
Joe Perchesd5113372013-09-23 11:33:53 -07001003void __secpath_destroy(struct sec_path *sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005static inline void
1006secpath_put(struct sec_path *sp)
1007{
1008 if (sp && atomic_dec_and_test(&sp->refcnt))
1009 __secpath_destroy(sp);
1010}
1011
Joe Perchesd5113372013-09-23 11:33:53 -07001012struct sec_path *secpath_dup(struct sec_path *src);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
1014static inline void
1015secpath_reset(struct sk_buff *skb)
1016{
1017#ifdef CONFIG_XFRM
1018 secpath_put(skb->sp);
1019 skb->sp = NULL;
1020#endif
1021}
1022
1023static inline int
David S. Miller6cc32962011-02-24 00:19:59 -05001024xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
Patrick McHardya1e59ab2006-09-19 12:57:34 -07001025{
1026 switch (family) {
1027 case AF_INET:
1028 return addr->a4 == 0;
1029 case AF_INET6:
1030 return ipv6_addr_any((struct in6_addr *)&addr->a6);
1031 }
1032 return 0;
1033}
1034
1035static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001036__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037{
1038 return (tmpl->saddr.a4 &&
1039 tmpl->saddr.a4 != x->props.saddr.a4);
1040}
1041
1042static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001043__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044{
1045 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001046 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047}
1048
1049static inline int
David S. Miller21eddb52011-02-24 01:35:16 -05001050xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051{
1052 switch (family) {
1053 case AF_INET:
1054 return __xfrm4_state_addr_cmp(tmpl, x);
1055 case AF_INET6:
1056 return __xfrm6_state_addr_cmp(tmpl, x);
1057 }
1058 return !0;
1059}
1060
1061#ifdef CONFIG_XFRM
Joe Perchesd5113372013-09-23 11:33:53 -07001062int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1063 unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
Herbert Xud5422ef2007-12-12 10:44:16 -08001065static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1066 struct sk_buff *skb,
1067 unsigned int family, int reverse)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068{
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001069 struct net *net = dev_net(skb->dev);
Herbert Xud5422ef2007-12-12 10:44:16 -08001070 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1071
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 if (sk && sk->sk_policy[XFRM_POLICY_IN])
Herbert Xud5422ef2007-12-12 10:44:16 -08001073 return __xfrm_policy_check(sk, ndir, skb, family);
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001074
Alexey Dobriyanf6e1e252008-11-25 17:35:44 -08001075 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001076 (skb_dst(skb)->flags & DST_NOPOLICY) ||
Herbert Xud5422ef2007-12-12 10:44:16 -08001077 __xfrm_policy_check(sk, ndir, skb, family);
1078}
1079
1080static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1081{
1082 return __xfrm_policy_check2(sk, dir, skb, family, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083}
1084
1085static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1086{
1087 return xfrm_policy_check(sk, dir, skb, AF_INET);
1088}
1089
1090static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1091{
1092 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1093}
1094
Herbert Xud5422ef2007-12-12 10:44:16 -08001095static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1096 struct sk_buff *skb)
1097{
1098 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1099}
1100
1101static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1102 struct sk_buff *skb)
1103{
1104 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1105}
1106
Joe Perchesd5113372013-09-23 11:33:53 -07001107int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1108 unsigned int family, int reverse);
Herbert Xud5422ef2007-12-12 10:44:16 -08001109
1110static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1111 unsigned int family)
1112{
1113 return __xfrm_decode_session(skb, fl, family, 0);
1114}
1115
1116static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1117 struct flowi *fl,
1118 unsigned int family)
1119{
1120 return __xfrm_decode_session(skb, fl, family, 1);
1121}
1122
Joe Perchesd5113372013-09-23 11:33:53 -07001123int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
1125static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1126{
Alexey Dobriyan99a66652008-11-25 17:36:13 -08001127 struct net *net = dev_net(skb->dev);
1128
1129 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
Eric Dumazetadf30902009-06-02 05:19:30 +00001130 (skb_dst(skb)->flags & DST_NOXFRM) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 __xfrm_route_forward(skb, family);
1132}
1133
1134static inline int xfrm4_route_forward(struct sk_buff *skb)
1135{
1136 return xfrm_route_forward(skb, AF_INET);
1137}
1138
1139static inline int xfrm6_route_forward(struct sk_buff *skb)
1140{
1141 return xfrm_route_forward(skb, AF_INET6);
1142}
1143
Joe Perchesd5113372013-09-23 11:33:53 -07001144int __xfrm_sk_clone_policy(struct sock *sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
1146static inline int xfrm_sk_clone_policy(struct sock *sk)
1147{
1148 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
1149 return __xfrm_sk_clone_policy(sk);
1150 return 0;
1151}
1152
Joe Perchesd5113372013-09-23 11:33:53 -07001153int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
1155static inline void xfrm_sk_free_policy(struct sock *sk)
1156{
1157 if (unlikely(sk->sk_policy[0] != NULL)) {
1158 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
1159 sk->sk_policy[0] = NULL;
1160 }
1161 if (unlikely(sk->sk_policy[1] != NULL)) {
1162 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
1163 sk->sk_policy[1] = NULL;
1164 }
1165}
1166
Joe Perchesd5113372013-09-23 11:33:53 -07001167void xfrm_garbage_collect(struct net *net);
Paul Mooree4c17212013-05-29 07:36:25 +00001168
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169#else
1170
1171static inline void xfrm_sk_free_policy(struct sock *sk) {}
1172static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
1173static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1174static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1175static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1176{
1177 return 1;
1178}
1179static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1180{
1181 return 1;
1182}
1183static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1184{
1185 return 1;
1186}
Herbert Xud5422ef2007-12-12 10:44:16 -08001187static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1188 struct flowi *fl,
1189 unsigned int family)
1190{
1191 return -ENOSYS;
1192}
1193static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1194 struct sk_buff *skb)
1195{
1196 return 1;
1197}
1198static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1199 struct sk_buff *skb)
1200{
1201 return 1;
1202}
Paul Mooree4c17212013-05-29 07:36:25 +00001203static inline void xfrm_garbage_collect(struct net *net)
1204{
1205}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206#endif
1207
1208static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001209xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210{
1211 switch (family){
1212 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001213 return (xfrm_address_t *)&fl->u.ip4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001215 return (xfrm_address_t *)&fl->u.ip6.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 }
1217 return NULL;
1218}
1219
1220static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001221xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222{
1223 switch (family){
1224 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001225 return (xfrm_address_t *)&fl->u.ip4.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 case AF_INET6:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001227 return (xfrm_address_t *)&fl->u.ip6.saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 }
1229 return NULL;
1230}
1231
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001232static __inline__
David S. Millere8a4e372011-02-22 17:42:56 -08001233void xfrm_flowi_addr_get(const struct flowi *fl,
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001234 xfrm_address_t *saddr, xfrm_address_t *daddr,
1235 unsigned short family)
1236{
1237 switch(family) {
1238 case AF_INET:
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001239 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1240 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001241 break;
1242 case AF_INET6:
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001243 *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr;
1244 *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr;
YOSHIFUJI Hideaki9bb182a2008-02-22 14:48:22 +09001245 break;
1246 }
1247}
1248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001250__xfrm4_state_addr_check(const struct xfrm_state *x,
1251 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
1253 if (daddr->a4 == x->id.daddr.a4 &&
1254 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1255 return 1;
1256 return 0;
1257}
1258
1259static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001260__xfrm6_state_addr_check(const struct xfrm_state *x,
1261 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262{
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001263 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1264 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 ipv6_addr_any((struct in6_addr *)saddr) ||
1266 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1267 return 1;
1268 return 0;
1269}
1270
1271static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001272xfrm_state_addr_check(const struct xfrm_state *x,
1273 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 unsigned short family)
1275{
1276 switch (family) {
1277 case AF_INET:
1278 return __xfrm4_state_addr_check(x, daddr, saddr);
1279 case AF_INET6:
1280 return __xfrm6_state_addr_check(x, daddr, saddr);
1281 }
1282 return 0;
1283}
1284
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001285static __inline__ int
David S. Millerf8848062011-02-24 01:42:28 -05001286xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001287 unsigned short family)
1288{
1289 switch (family) {
1290 case AF_INET:
1291 return __xfrm4_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001292 (const xfrm_address_t *)&fl->u.ip4.daddr,
1293 (const xfrm_address_t *)&fl->u.ip4.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001294 case AF_INET6:
1295 return __xfrm6_state_addr_check(x,
David S. Miller7e1dc7b2011-03-12 02:42:11 -05001296 (const xfrm_address_t *)&fl->u.ip6.daddr,
1297 (const xfrm_address_t *)&fl->u.ip6.saddr);
Masahide NAKAMURAe53820d2006-08-23 19:12:01 -07001298 }
1299 return 0;
1300}
1301
David S. Millerf8848062011-02-24 01:42:28 -05001302static inline int xfrm_state_kern(const struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303{
1304 return atomic_read(&x->tunnel_users);
1305}
1306
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001307static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1308{
Masahide NAKAMURAdc00a522006-08-23 17:49:52 -07001309 return (!userproto || proto == userproto ||
1310 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1311 proto == IPPROTO_ESP ||
1312 proto == IPPROTO_COMP)));
Masahide NAKAMURA57947082006-09-22 15:06:24 -07001313}
1314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315/*
1316 * xfrm algorithm information
1317 */
Herbert Xu1a6509d2008-01-28 19:37:29 -08001318struct xfrm_algo_aead_info {
1319 u16 icv_truncbits;
1320};
1321
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322struct xfrm_algo_auth_info {
1323 u16 icv_truncbits;
1324 u16 icv_fullbits;
1325};
1326
1327struct xfrm_algo_encr_info {
1328 u16 blockbits;
1329 u16 defkeybits;
1330};
1331
1332struct xfrm_algo_comp_info {
1333 u16 threshold;
1334};
1335
1336struct xfrm_algo_desc {
1337 char *name;
Herbert Xu04ff1262006-08-13 08:50:00 +10001338 char *compat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 u8 available:1;
Jussi Kivilinna7e50f842013-01-31 12:40:38 +02001340 u8 pfkey_supported:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 union {
Herbert Xu1a6509d2008-01-28 19:37:29 -08001342 struct xfrm_algo_aead_info aead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 struct xfrm_algo_auth_info auth;
1344 struct xfrm_algo_encr_info encr;
1345 struct xfrm_algo_comp_info comp;
1346 } uinfo;
1347 struct sadb_alg desc;
1348};
1349
1350/* XFRM tunnel handlers. */
1351struct xfrm_tunnel {
1352 int (*handler)(struct sk_buff *skb);
jamala6337462010-02-09 13:21:17 +00001353 int (*err_handler)(struct sk_buff *skb, u32 info);
Herbert Xud2acc342006-03-28 01:12:13 -08001354
Eric Dumazetb33eab02010-10-25 21:01:26 +00001355 struct xfrm_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001356 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357};
1358
Fan Duaba82692013-08-28 15:09:40 +08001359struct xfrm_tunnel_notifier {
1360 int (*handler)(struct sk_buff *skb);
1361 struct xfrm_tunnel_notifier __rcu *next;
1362 int priority;
1363};
1364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365struct xfrm6_tunnel {
Herbert Xud2acc342006-03-28 01:12:13 -08001366 int (*handler)(struct sk_buff *skb);
1367 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -07001368 u8 type, u8 code, int offset, __be32 info);
Eric Dumazet6f0bcf12010-10-24 21:33:16 +00001369 struct xfrm6_tunnel __rcu *next;
Herbert Xud2acc342006-03-28 01:12:13 -08001370 int priority;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371};
1372
Joe Perchesd5113372013-09-23 11:33:53 -07001373void xfrm_init(void);
1374void xfrm4_init(void);
1375int xfrm_state_init(struct net *net);
1376void xfrm_state_fini(struct net *net);
1377void xfrm4_state_init(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001378#ifdef CONFIG_XFRM
Joe Perchesd5113372013-09-23 11:33:53 -07001379int xfrm6_init(void);
1380void xfrm6_fini(void);
1381int xfrm6_state_init(void);
1382void xfrm6_state_fini(void);
Daniel Lezcanoc35b7e72007-12-08 00:14:11 -08001383#else
1384static inline int xfrm6_init(void)
1385{
1386 return 0;
1387}
1388static inline void xfrm6_fini(void)
1389{
1390 ;
1391}
1392#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001394#ifdef CONFIG_XFRM_STATISTICS
Joe Perchesd5113372013-09-23 11:33:53 -07001395int xfrm_proc_init(struct net *net);
1396void xfrm_proc_fini(struct net *net);
Masahide NAKAMURA558f82e2007-12-20 20:42:57 -08001397#endif
1398
Joe Perchesd5113372013-09-23 11:33:53 -07001399int xfrm_sysctl_init(struct net *net);
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001400#ifdef CONFIG_SYSCTL
Joe Perchesd5113372013-09-23 11:33:53 -07001401void xfrm_sysctl_fini(struct net *net);
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001402#else
1403static inline void xfrm_sysctl_fini(struct net *net)
1404{
1405}
1406#endif
1407
Joe Perchesd5113372013-09-23 11:33:53 -07001408void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
1409int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1410 int (*func)(struct xfrm_state *, int, void*), void *);
Fan Du283bc9f2013-11-07 17:47:50 +08001411void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
Joe Perchesd5113372013-09-23 11:33:53 -07001412struct xfrm_state *xfrm_state_alloc(struct net *net);
1413struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1414 const xfrm_address_t *saddr,
1415 const struct flowi *fl,
1416 struct xfrm_tmpl *tmpl,
1417 struct xfrm_policy *pol, int *err,
1418 unsigned short family);
1419struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1420 xfrm_address_t *daddr,
1421 xfrm_address_t *saddr,
1422 unsigned short family,
1423 u8 mode, u8 proto, u32 reqid);
1424int xfrm_state_check_expire(struct xfrm_state *x);
1425void xfrm_state_insert(struct xfrm_state *x);
1426int xfrm_state_add(struct xfrm_state *x);
1427int xfrm_state_update(struct xfrm_state *x);
1428struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1429 const xfrm_address_t *daddr, __be32 spi,
1430 u8 proto, unsigned short family);
1431struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1432 const xfrm_address_t *daddr,
1433 const xfrm_address_t *saddr,
1434 u8 proto,
1435 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001436#ifdef CONFIG_XFRM_SUB_POLICY
Joe Perchesd5113372013-09-23 11:33:53 -07001437int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
Fan Du283bc9f2013-11-07 17:47:50 +08001438 unsigned short family, struct net *net);
Joe Perchesd5113372013-09-23 11:33:53 -07001439int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1440 unsigned short family);
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001441#else
1442static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
Fan Du283bc9f2013-11-07 17:47:50 +08001443 int n, unsigned short family, struct net *net)
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001444{
1445 return -ENOSYS;
1446}
1447
1448static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1449 int n, unsigned short family)
1450{
1451 return -ENOSYS;
1452}
1453#endif
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001454
1455struct xfrmk_sadinfo {
1456 u32 sadhcnt; /* current hash bkts */
1457 u32 sadhmcnt; /* max allowed hash bkts */
1458 u32 sadcnt; /* current running count */
1459};
1460
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001461struct xfrmk_spdinfo {
1462 u32 incnt;
1463 u32 outcnt;
1464 u32 fwdcnt;
1465 u32 inscnt;
1466 u32 outscnt;
1467 u32 fwdscnt;
1468 u32 spdhcnt;
1469 u32 spdhmcnt;
1470};
1471
Joe Perchesd5113372013-09-23 11:33:53 -07001472struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1473int xfrm_state_delete(struct xfrm_state *x);
1474int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info);
1475void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1476void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1477u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1478int xfrm_init_replay(struct xfrm_state *x);
1479int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1480int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1481int xfrm_init_state(struct xfrm_state *x);
1482int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1483int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1484int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1485int xfrm_output_resume(struct sk_buff *skb, int err);
1486int xfrm_output(struct sk_buff *skb);
1487int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1488void xfrm_local_error(struct sk_buff *skb, int mtu);
1489int xfrm4_extract_header(struct sk_buff *skb);
1490int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1491int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1492 int encap_type);
1493int xfrm4_transport_finish(struct sk_buff *skb, int async);
1494int xfrm4_rcv(struct sk_buff *skb);
Herbert Xuc4541b42007-10-17 21:28:53 -07001495
1496static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1497{
1498 return xfrm4_rcv_encap(skb, nexthdr, spi, 0);
1499}
1500
Joe Perchesd5113372013-09-23 11:33:53 -07001501int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1502int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1503int xfrm4_output(struct sk_buff *skb);
1504int xfrm4_output_finish(struct sk_buff *skb);
1505int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1506int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001507void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
David S. Miller7b77d162013-09-30 15:11:00 -04001508int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
1509int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
Steffen Klassert212e5602013-08-19 08:07:34 +02001510int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
1511int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
Joe Perchesd5113372013-09-23 11:33:53 -07001512int xfrm6_extract_header(struct sk_buff *skb);
1513int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1514int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);
1515int xfrm6_transport_finish(struct sk_buff *skb, int async);
1516int xfrm6_rcv(struct sk_buff *skb);
1517int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1518 xfrm_address_t *saddr, u8 proto);
David S. Miller7b77d162013-09-30 15:11:00 -04001519void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
Joe Perchesd5113372013-09-23 11:33:53 -07001520int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
David S. Miller7b77d162013-09-30 15:11:00 -04001521int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001522__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1523__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1524int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1525int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1526int xfrm6_output(struct sk_buff *skb);
1527int xfrm6_output_finish(struct sk_buff *skb);
1528int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1529 u8 **prevhdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
1531#ifdef CONFIG_XFRM
Joe Perchesd5113372013-09-23 11:33:53 -07001532int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1533int xfrm_user_policy(struct sock *sk, int optname,
1534 u8 __user *optval, int optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535#else
1536static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1537{
1538 return -ENOPROTOOPT;
1539}
1540
James Chapman067b2072007-07-05 17:08:05 -07001541static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542{
1543 /* should not happen */
1544 kfree_skb(skb);
1545 return 0;
1546}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547#endif
1548
Alexey Dobriyan0331b1f2008-11-25 17:21:45 -08001549struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
Timo Teras4c563f72008-02-28 21:31:08 -08001550
Joe Perchesd5113372013-09-23 11:33:53 -07001551void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1552int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1553 int (*func)(struct xfrm_policy *, int, int, void*),
1554 void *);
Fan Du283bc9f2013-11-07 17:47:50 +08001555void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
Jamal Hadi Salim8ca2e932010-02-22 11:32:57 +00001557struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1558 u8 type, int dir,
Masahide NAKAMURA4e81bb82006-08-23 22:43:30 -07001559 struct xfrm_selector *sel,
Eric Parisef41aaa2007-03-07 15:37:58 -08001560 struct xfrm_sec_ctx *ctx, int delete,
1561 int *err);
Joe Perchesd5113372013-09-23 11:33:53 -07001562struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1563 u32 id, int delete, int *err);
Alexey Dobriyan33ffbbd2008-11-25 17:33:32 -08001564int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565u32 xfrm_get_acqseq(void);
Joe Perchesd5113372013-09-23 11:33:53 -07001566int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
Mathias Krausee473fcb2013-06-26 23:56:58 +02001567struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001568 u8 mode, u32 reqid, u8 proto,
David S. Millera70486f2011-02-27 23:17:24 -08001569 const xfrm_address_t *daddr,
1570 const xfrm_address_t *saddr, int create,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001571 unsigned short family);
Joe Perchesd5113372013-09-23 11:33:53 -07001572int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001574#ifdef CONFIG_XFRM_MIGRATE
Joe Perchesd5113372013-09-23 11:33:53 -07001575int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1576 const struct xfrm_migrate *m, int num_bundles,
1577 const struct xfrm_kmaddress *k);
Fan Du283bc9f2013-11-07 17:47:50 +08001578struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
Joe Perchesd5113372013-09-23 11:33:53 -07001579struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1580 struct xfrm_migrate *m);
1581int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1582 struct xfrm_migrate *m, int num_bundles,
Fan Du8d549c42013-11-07 17:47:49 +08001583 struct xfrm_kmaddress *k, struct net *net);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001584#endif
1585
Joe Perchesd5113372013-09-23 11:33:53 -07001586int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1587void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1588int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1589 xfrm_address_t *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590
Joe Perchesd5113372013-09-23 11:33:53 -07001591void xfrm_input_init(void);
1592int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593
Joe Perchesd5113372013-09-23 11:33:53 -07001594void xfrm_probe_algs(void);
1595int xfrm_count_pfkey_auth_supported(void);
1596int xfrm_count_pfkey_enc_supported(void);
1597struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1598struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1599struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1600struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1601struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1602struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1603struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1604struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1605struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1606 int probe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
YOSHIFUJI Hideaki / 吉藤英明ff88b302013-01-29 12:48:31 +00001608static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1609 const xfrm_address_t *b)
1610{
1611 return ipv6_addr_equal((const struct in6_addr *)a,
1612 (const struct in6_addr *)b);
1613}
1614
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001615static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1616 const xfrm_address_t *b,
1617 sa_family_t family)
1618{
1619 switch (family) {
1620 default:
1621 case AF_INET:
1622 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1623 case AF_INET6:
1624 return xfrm6_addr_equal(a, b);
1625 }
1626}
1627
Herbert Xu77d8d7a2005-10-05 12:15:12 -07001628static inline int xfrm_policy_id2dir(u32 index)
1629{
1630 return index & 7;
1631}
1632
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001633#ifdef CONFIG_XFRM
1634static inline int xfrm_aevent_is_on(struct net *net)
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001635{
Patrick McHardybe336902006-03-20 22:40:54 -08001636 struct sock *nlsk;
1637 int ret = 0;
1638
1639 rcu_read_lock();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001640 nlsk = rcu_dereference(net->xfrm.nlsk);
Patrick McHardybe336902006-03-20 22:40:54 -08001641 if (nlsk)
1642 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1643 rcu_read_unlock();
1644 return ret;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001645}
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001646#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001647
David S. Miller85158622011-02-27 23:07:02 -08001648static inline int xfrm_alg_len(const struct xfrm_algo *alg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08001649{
1650 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1651}
1652
David S. Miller85158622011-02-27 23:07:02 -08001653static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
Martin Willi4447bb32009-11-25 00:29:52 +00001654{
1655 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1656}
1657
Steffen Klassert9736acf2011-03-08 00:05:43 +00001658static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1659{
1660 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1661}
1662
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001663#ifdef CONFIG_XFRM_MIGRATE
Steffen Klassertaf2f4642011-03-28 19:46:39 +00001664static inline int xfrm_replay_clone(struct xfrm_state *x,
1665 struct xfrm_state *orig)
1666{
1667 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1668 GFP_KERNEL);
1669 if (!x->replay_esn)
1670 return -ENOMEM;
1671
1672 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1673 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1674
1675 x->preplay_esn = kmemdup(x->replay_esn,
1676 xfrm_replay_state_esn_len(x->replay_esn),
1677 GFP_KERNEL);
1678 if (!x->preplay_esn) {
1679 kfree(x->replay_esn);
1680 return -ENOMEM;
1681 }
1682
1683 return 0;
1684}
1685
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001686static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1687{
Eric Dumazet0f99be02008-01-08 23:39:06 -08001688 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001689}
1690
Martin Willi4447bb32009-11-25 00:29:52 +00001691static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1692{
1693 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1694}
1695
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001696static inline void xfrm_states_put(struct xfrm_state **states, int n)
1697{
1698 int i;
1699 for (i = 0; i < n; i++)
1700 xfrm_state_put(*(states + i));
1701}
1702
1703static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1704{
1705 int i;
1706 for (i = 0; i < n; i++)
1707 xfrm_state_delete(*(states + i));
1708}
1709#endif
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001710
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001711#ifdef CONFIG_XFRM
Herbert Xu00501122007-12-11 01:53:43 -08001712static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1713{
1714 return skb->sp->xvec[skb->sp->len - 1];
1715}
Alexey Dobriyandef8b4f2008-10-28 13:24:06 -07001716#endif
Herbert Xu00501122007-12-11 01:53:43 -08001717
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001718static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1719{
1720 if (attrs[XFRMA_MARK])
Andreas Steffen4efd7e82010-06-30 10:41:15 -07001721 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001722 else
1723 m->v = m->m = 0;
1724
1725 return m->v & m->m;
1726}
1727
David S. Millere3dfa382011-02-27 23:20:19 -08001728static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001729{
David S. Miller1d1e34d2012-06-27 21:57:03 -07001730 int ret = 0;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001731
David S. Miller1d1e34d2012-06-27 21:57:03 -07001732 if (m->m | m->v)
1733 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1734 return ret;
Jamal Hadi Salimbf825f82010-02-22 11:32:54 +00001735}
1736
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737#endif /* _NET_XFRM_H */